What is the role of urodynamic study in the workup of overactive bladder (OAB) in children?

Updated: Apr 01, 2019
  • Author: Pamela I Ellsworth, MD; Chief Editor: Edward David Kim, MD, FACS  more...
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A urodynamic study is an invasive study that should be obtained only in select children with voiding dysfunction. Before this study is performed, the child and parents should be fully aware of what the study entails. If the child is very anxious during the study, the results may be affected, especially during the filling cycle (detrusor overactivity may be noted) or during voiding (incomplete pelvic floor muscle relaxation may be noted).

The urodynamic study has several components. The child is first asked to void just before the study is begun. A sterile urodynamic catheter is then placed via the urethra into the bladder, and the postvoid residual volume is recorded.

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